This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: How fast does light travel from Proxima Centuri to Earth? a. 4.2 ly b. 4.2 years c. 3 108 m/s ... (Read 62 times)

futuristic

  • Hero Member
  • *****
  • Posts: 638
on: Jul 27, 2018
How fast does light travel from Proxima Centuri to Earth?
 
  a. 4.2 ly b. 4.2 years
  c. 3  108 m/s d. None of the other choices are correct.

Question 2

How long does light take to reach us from Proxima Centuri?
 
  a. 4.2 ly b. 4.2 years
  c. 8.4 AU d. 8.4 km


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Carliemb17

  • Sr. Member
  • ****
  • Posts: 325
Reply #1 on: Jul 27, 2018
Answer to Question 1

c
RATIONALE: Light travels at the speed of light c.

Answer to Question 2

b
RATIONALE: How long refers to time not distance.


futuristic

  • Member
  • Posts: 638
Reply 2 on: Jul 27, 2018
Wow, this really help

ebonylittles

  • Member
  • Posts: 318
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Did you know?

Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

A light-coloured cane toad A light-coloured cane toad
This older woman is exploring new avenues of enjoyment as she avoids stagnation in her later years This older woman is exploring new avenues of enjoyment as she avoids stagnation in her later years
Ngandong calottes from Java are the youngest H. erectus fossils at perhaps 27,000-50,000 years old. Ngandong calottes from Java are the youngest H. erectus fossils at perhaps 27,000-50,000 years old.
Climate change occurs over millions of years Climate change occurs over millions of years
Earth emits radiation back out to space from all surfaces, both day and night Earth emits radiation back out to space from all surfaces, both day and night
Do you know how fast you should be going? Do you know how fast you should be going?
Video: Apicomplexan life cycle Animation

For a complete list of videos, visit our video library